But Mohyeldin's Twitter feed has been inactive since Wednesday and, although he provided his eyewitness account that morning on the "Today" show, he was conspicuously absent from that evening's broadcast of "NBC Nightly News."

The next day, Glenn Greenwald of The Intercept reported that NBC executives cited "security concerns" that had motivated the decision. A source also told the Huffington Post's Michael Calderone that executives were motivated by those concerns.

But speculation — and suspicion — surrounding the decision has been rampant. Journalist Rania Khalek noted Thursday that a pair of Mohyeldin's social media posts on the State Department blaming Hamas for the Gaza attack were deleted.

The network source, however, told Calderone that the deleted posts were not a factor in the decision.

It was one of two controversies this week surrounding a news outlet's decision to remove a reporter from coverage of the Israel-Hamas conflict.

CNN correspondent Diana Magnay was re-assigned to Moscow after she referred to a group of Israelis who cheered the bombing of Gaza on Thursday as "scum."